Andradite and Creedite Physical Properties

Andradite

Creedite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.102.70

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

none

Perfect on {100}

1.7 Mohs Hardness

6.5-74.5

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

Andradite and Creedite Chemical Formula

While comparing Andradite and Creedite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Andradite and Creedite chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

Compare Green Gemstones

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Andradite and Creedite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Creedite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Creedite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 2.70 whereas that of Creedite is 2.70.